Difference between revisions of "B-20M (20 mm)"

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{{About
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| about = Soviet cannon '''{{PAGENAME}}'''
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| usage = other versions
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| link = B-20 (20 mm) (Family)
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}}
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== Description ==
 
== Description ==
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''Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Compile a list of air, ground, or naval vehicles that feature this weapon system in the game.''
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The B-20 is a Soviet aviation small-caliber automatic cannon of 20 mm caliber. Created by weapons designer M.E. Berezin during the WW2 by remaking his 12.7 mm UB machine gun chambered for the 20 mm ShVAK cannon for a competition in which Vladimirov’s V-20 and Shpitalny’s Sh-20 designs. The B-20M designation denotes a B-20 configuration that is mounted to fire through the propeller shaft.
  
 
=== Vehicles equipped with this weapon ===
 
=== Vehicles equipped with this weapon ===
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* {{Specs-Link|yak-3p}}
 
* {{Specs-Link|yak-3p}}
 
* {{Specs-Link|yak-9p}}
 
* {{Specs-Link|yak-9p}}
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* {{Specs-Link|yak-9p_hungary}}
  
 
== General info ==
 
== General info ==
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''Tell us about the tactical and technical characteristics of the cannon or machine gun.''
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The gun has 6 ammunition options. Use them depending on the situation and needs on the battlefield
  
 
=== Available ammunition ===
 
=== Available ammunition ===
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* '''Ground targets:''' {{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|FI-T|Fragmentation incendiary tracer}}{{-}}{{Annotation|AP-I|Armour-piercing incendiary}}
 
* '''Ground targets:''' {{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|FI-T|Fragmentation incendiary tracer}}{{-}}{{Annotation|AP-I|Armour-piercing incendiary}}
 
* '''Tracers:''' {{Annotation|FI-T|Fragmentation incendiary tracer}}{{-}}{{Annotation|FI-T|Fragmentation incendiary tracer}}{{-}}{{Annotation|FI-T|Fragmentation incendiary tracer}}
 
* '''Tracers:''' {{Annotation|FI-T|Fragmentation incendiary tracer}}{{-}}{{Annotation|FI-T|Fragmentation incendiary tracer}}{{-}}{{Annotation|FI-T|Fragmentation incendiary tracer}}
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* '''Armored targets:''' {{Annotation|AP-I|Armour-piercing incendiary}}{{-}}{{Annotation|FI-T|Fragmentation incendiary tracer}}{{-}}{{Annotation|AP-I|Armour-piercing incendiary}}{{-}}{{Annotation|AP-I|Armour-piercing incendiary}}
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* '''Armoured targets:''' {{Annotation|AP-I|Armour-piercing incendiary}}{{-}}{{Annotation|FI-T|Fragmentation incendiary tracer}}{{-}}{{Annotation|AP-I|Armour-piercing incendiary}}{{-}}{{Annotation|AP-I|Armour-piercing incendiary}}
 
* '''Stealth:''' {{Annotation|AP-I|Armour-piercing incendiary}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|FI|Fragmentation incendiary}}
 
* '''Stealth:''' {{Annotation|AP-I|Armour-piercing incendiary}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|FI|Fragmentation incendiary}}
  
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== Usage in battles ==
 
== Usage in battles ==
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''Describe the cannon/machine gun in the game - its distinctive features, tactics of usage against notable opponents. Please don't write a "guide" - do not impose a single point of view, but give the reader food for thought.''
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This gun is designed for combat with enemy aircraft. Therefore, your main goal is to shoot down enemy planes, which the guns can successfully deal with. But you can also destroy open or lightly armored vehicles with the right ammunition.
  
 
=== Pros and cons ===
 
=== Pros and cons ===
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''Summarise and briefly evaluate the weaponry in terms of its characteristics and combat effectiveness. Mark pros and cons as a list.''
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'''Pros:'''
  
−
'''Pros:'''
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* Decent rate of fire
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*
 
  
 
'''Cons:'''
 
'''Cons:'''
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*
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* AP-I ammunition can pen only 28 mm of armor at 10 m so not useful against decently armored vehicles.
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* Usually the gun has about 115-120 shots, which is often not enough for prolonged battles.
  
 
== History ==
 
== History ==
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''Examine the history of the creation and combat usage of the weapon in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the weapon and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Weapon-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>.''
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The development of the weapon began back in 1941, with the GKO decree No. 106 "On the testing of the 20 mm Berezin aircraft cannon" issued on July 11 of that year. It was planned to conduct factory tests of two cannons by July 16, prepare three cannons for field tests by July 18, and by July 25, mount two wing cannons on the Il-2 and one motor cannon on the LaGG-3 for flight testing.
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In the memoirs of the Deputy People's Commissar of Armaments, V. N. Novikov, it is claimed that the cannon only reached initial testing at the end of 1943. According to him, the main difficulties arose from modifying the bolt and the receiver. The problems were likely caused by the fact that the ShVAK cannon cartridge, unlike the UB machine gun cartridge, had a rim. Thanks to close collaboration with the factory designers, the cannon turned out not only to be very light (half the weight of the ShVAK) but also significantly more technologically advanced.
  
 
== Media ==
 
== Media ==
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== See also ==
 
== See also ==
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''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
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<!-- ''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
 
* ''reference to the article about the variant of the cannon/machine gun;''
 
* ''reference to the article about the variant of the cannon/machine gun;''
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* ''references to approximate analogues by other nations and research trees.''
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* ''references to approximate analogues by other nations and research trees.'' -->
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;Related development
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* [[B-20 (20 mm) (Family)]]
  
 
== External links ==
 
== External links ==
 
''Paste links to sources and external resources, such as:''
 
''Paste links to sources and external resources, such as:''
 +
 
* ''topic on the official game forum;''
 
* ''topic on the official game forum;''
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* ''encyclopedia page on the weapon;''
 
 
* ''other literature.''
 
* ''other literature.''
  
 
{{USSR aircraft cannons}}
 
{{USSR aircraft cannons}}
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{{Italy aircraft cannons}}
  
 
[[Category:Aircraft cannons]]
 
[[Category:Aircraft cannons]]

Latest revision as of 05:28, 28 August 2024

This page is about the Soviet cannon B-20M (20 mm). For other versions, see B-20 (20 mm) (Family).

Description

The B-20 is a Soviet aviation small-caliber automatic cannon of 20 mm caliber. Created by weapons designer M.E. Berezin during the WW2 by remaking his 12.7 mm UB machine gun chambered for the 20 mm ShVAK cannon for a competition in which Vladimirov’s V-20 and Shpitalny’s Sh-20 designs. The B-20M designation denotes a B-20 configuration that is mounted to fire through the propeller shaft.

Vehicles equipped with this weapon

General info

The gun has 6 ammunition options. Use them depending on the situation and needs on the battlefield

Available ammunition

  • Default: FI-T · AP-I
  • Universal: FI-T · HEF · AP-I · FI-T
  • Ground targets: HEF · FI-T · AP-I
  • Tracers: FI-T · FI-T · FI-T
  • Armoured targets: AP-I · FI-T · AP-I · AP-I
  • Stealth: AP-I · HEF · HEF · FI
Penetration statistics
Ammunition Type of
warhead 		Penetration @ 0° Angle of Attack (mm)
10 m 100 m 500 m 1,000 m 1,500 m 2,000 m
FI-T FI-T 2 2 2 2 2 2
AP-I AP-I 28 24 14 7 4 2
HEF HEF 2 2 2 2 2 2
FI FI 2 2 2 2 2 2
Shell details
Ammunition Type of
warhead 		Velocity
(m/s) 		Projectile
mass (kg) 		Fuse delay
(m) 		Fuse sensitivity
(mm) 		Explosive mass
(TNT equivalent) (g) 		Ricochet
0% 50% 100%
FI-T FI-T 800 0.1 0.04 0.1 6.36 47° 56° 65°
AP-I AP-I 800 0.1 N/A N/A N/A 47° 56° 65°
HEF HEF 800 0.1 0.04 0.1 5.8 79° 80° 81°
FI FI 800 0.1 0.04 0.1 8.62 47° 56° 65°

Comparison with analogues

Give a comparative description of cannons/machine guns that have firepower equal to this weapon.

Usage in battles

This gun is designed for combat with enemy aircraft. Therefore, your main goal is to shoot down enemy planes, which the guns can successfully deal with. But you can also destroy open or lightly armored vehicles with the right ammunition.

Pros and cons

Pros:

  • Decent rate of fire

Cons:

  • AP-I ammunition can pen only 28 mm of armor at 10 m so not useful against decently armored vehicles.
  • Usually the gun has about 115-120 shots, which is often not enough for prolonged battles.

History

The development of the weapon began back in 1941, with the GKO decree No. 106 "On the testing of the 20 mm Berezin aircraft cannon" issued on July 11 of that year. It was planned to conduct factory tests of two cannons by July 16, prepare three cannons for field tests by July 18, and by July 25, mount two wing cannons on the Il-2 and one motor cannon on the LaGG-3 for flight testing.

In the memoirs of the Deputy People's Commissar of Armaments, V. N. Novikov, it is claimed that the cannon only reached initial testing at the end of 1943. According to him, the main difficulties arose from modifying the bolt and the receiver. The problems were likely caused by the fact that the ShVAK cannon cartridge, unlike the UB machine gun cartridge, had a rim. Thanks to close collaboration with the factory designers, the cannon turned out not only to be very light (half the weight of the ShVAK) but also significantly more technologically advanced.

Media

Excellent additions to the article would be video guides, screenshots from the game, and photos.

See also

Related development

External links

Paste links to sources and external resources, such as:

  • topic on the official game forum;
  • other literature.


USSR aircraft cannons
20 mm  B-20E · B-20M · B-20S · ShVAK
23 mm  GSh-6-23M · GSh-23L · NR-23 · NS-23 · NS-23K · PTB-23 · VYa-23
30 mm  2A42 · GSh-6-30 · GSh-30-1 · GSh-30-2 · GSh-30-2K · NR-30
37 mm  N-37 · N-37D · NS-37 · SH-37
45 mm  NS-45
  Foreign:
20 mm  Hispano Mk.II (Britain) · MG 151 (Germany)
37 mm  M4 (USA) · M10 (USA)

Italy aircraft cannons
20 mm  TM197B
30 mm  Hispano HS 825
37 mm  Breda Model 39 37/54
102 mm  102/35 mod 14
  Foreign:
20 mm  B-20E (USSR) · B-20M (USSR) · B-20S (USSR) · Hispano 404 (France) · Hispano Mk.II (Britain) · Hispano Mk.V (Britain) · M24A1 (USA) · M61A1 (USA) · MG 151 (Germany) · MG FF (Germany) · MG FF/M (Germany) · ShVAK (USSR)
23 mm  GSh-23L (USSR) · NR-23 (USSR) · NS-23 (USSR)
27 mm  Akan m/85 (Sweden) · Mauser BK27 (Germany)
30 mm  DEFA 552 (France) · GSh-30-1 (USSR) · GSh-30-2K (USSR) · MK 103 (Germany) · MK 108 (Germany) · NR-30 (USSR)
37 mm  BK 3.7 (Germany) · N-37 (USSR) · N-37D (USSR)

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